<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        姓：<input type="text" v-model="firstName"><br>
        名：<input type="text" v-model="lastName"><br>
        全名：<span>{{fullName}}</span><br>
    </div>
    <script>
        Vue.config.productionTip = false

        const vm = new Vue({
            el:'#root',
            data:{
                firstName:"张",
                lastName:'三'
            }, 
            computed:{
                // 完整写法
                // fullName:{
                //     get(){
                //         console.log('get别调用了');
                //         return this.firstName + '-' + this.lastName
                //     },
                //     set(value){
                //         const arr = value.split('-')
                //         this.firstName = arr[0]
                //         this.lastName = arr[1]
                //     }
                // }
                // 简写
                fullName(){
                    console.log('get别调用了');
                    return this.firstName + '-' + this.lastName
                }
            }
        })
    </script>
</body>
</html>